Improvement in well-tubings



j. MME SLC. W. BDEY.

Well-Tubing.

Wfl??? @aff ef.

JOHN BAILIE AND CHARLES W. BODEY, OF TARENTUM, PENNSYLVANIA.

IMPROVEMENT IN WELL-TUBINGS.

Specification forming part of Letters Patent No. 134,453, dated December 31, 1872.

To all whom it may concern:

Be it known that we, JOHN BAILIE and CHARLES W. BODEY, both of Tarentum, in the county of Allegheny and State of Pennsylvania, have invented a certain new and useful Improvement in Tubing Oil or Salt Wells; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon.

The nature of our invention consists in providing the lower end `of the casing of oil or salt wells with pump-tubin g and chamber, said casing, tubing, and chamber being connected and arranged with relation to each otherso as t0 serve the double purpose of casing and pump-tubing.

To enable others skilled in the art to make i and use our invention, we will proceed to describe its construction and operation.

In the accompanying drawing which forms part of our specification, Figure 1 is a vertical section of an oil or salt well, in which is placed the casing and tubing as combined by us and Fig. 2 is a vertical section of an oil or salt well provided with the casin g and tubing, representing a different method from that shown in Fig. 1 for connecting the casing and tubing and for packing the joint at the point of union.

In the ordinary mode of operating oil and salt wells a casing is placed in the welLfor shutting off the ilow of surface-water into it. This casing usually extends from the surface of the ground down in the well to the rock,which is impervious to the water, at which point an offset is formed by making the bore of the well less in diameter. In this casing is placed a tube much less in diameter than the diameter of the casing. The tubing placed in the casing is called the pump-tubing,77 and is often eight hundred (800) feet in length.

The object of our invention is to dispense with the use of the pump-tubing from the curb of the well downto the dry rock, where the casing usually ends, and rests on the off-- set in the rock.

To accomplish this very desirable object we fit upon the upper end of a length of the pump-tubing7 C a :flat ring, D, of such outer diameter that it will freely pass inside of the casing B. Above the ring D is screwed upon the tubing C a sleeve, e, the bore of which is provided with screw-threads f. On the tub ing C, below the ring, is fitted a gum cylinder, h, the largest diameter of which is about equal to the outer diameter of the ring D.' A seedbag or a wrapping of twine or muslin saturated with tallow may be used as a substitute for the gum cylinderh. The gum cylinder or wrapping must be of such size and form as to iit the bore of the well below the offset x, upon which the lower end of the casing B rests. We propose tapering-the bore of the well, conimencing at the otlset w, the taper extending down about two feet below the oiset. By this taper oflthe bore, combined with the wrapping, we are enabled to pack the joint at x so as to prevent leakage. The .pump-tubing7 extends down in the well from the offset to the salt or oil bearing rock.

The casing Bis lowered into the well in the ordinary manner and by the usual means, and the upper end of the pump-tubin g C, being furnished with the ring, sleeve, and wrappin g, is then lowered in the casing, and its weight will cause the joint at the taper portion of the well to be thoroughly packed. The pump-tubin g is then provided with the usual pumping device, and is operated in the usual manner for pump ing oil or salt-water.

The casingB answers the double purpose of of casing and pump-tubing, whereby a large amount of tubing is saved, four or five hun dred feet being often required to reach from the offset x in the well lto the surface of the ground.

Fig. 2 represents a modified form of our imn prov'ement, which form we would prefer using in new wells, particularly saltwel1s. 'm rep resents the gum packing placed between t-he inward projection n of the casing B and the beveled portion of the sleeve 'w on the upper end of the pump-tubing. This mode of pack ing will be clearly understood by the skillful mechanic without further explanation.

The pump-tubin g C is removed from the well by screwing the lower end of the pump-rod into the sleeve f or w and then withdrawing the rod and tubing by the means common to oil-wells; and the tubing is replaced in the well through themedium of the pump-rod attached to it in like, manner.

Having thus described our improvement, the point of junction between thecasing and what We claim as of our` invention is pump-tubing, substantially as described, and

l. The casing of an oil or salt well the lower for the purpose set forth. end of which is provided with a pump-tubing JOHN BAILIE. and chamber, substantially as herein described7 CHAS. W. BODEY. and for the purpose set forth. Witnesses:

2. In combination with the subject-matter WM. W. S. DYRE,

of first clause of claim, a suitable packing at JAMES J. JOHNSTON. 

